Attachment for squares



NOV. 8, 1927. `1,648,266

J. l.. GRASS ATTACHMENT FOR SQUARES Filed March 27, 1925 Patented Nov. 8, 19?'7.v

Unirse sara JACOB L. GRASS, or oWAToNnA, iannnse'ra.'

arracniannr non aerienne.

application ered March 27, 1925. semina. 18,2100.

My invent-ion has for its object to provide an extremely simple and highly eflicient attachment for squares. and to this end it cons-ists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is an elevation of a try-square having an attachment applied thereto and holding a round member, indicated by broken lines, against one of the sidesof the square;

Fig. 2 is an end elevation of the square and attachment. as shown in Fig. 1, with the exception that the square has been adjusted to position 'the' rod perpendicular to the square blade;

Fig. 3 is a perspective view of the attachment removed from the square;

Fig. 4 is a view corresponding tov Fig. 1

but showing a headed member. indicated by broken lines.y held by the attachment; and Fig. 5 is a perspective view showinga slight modification of the attachment applied to a carpenters square, indicated by broken lines.

Referring first to the invention as shown in Figs. 1 to 4, inclusive,v the numeral. 6 indicates a. try-square having a sliding blade, and its leg has at its longitudinal edges T- flang-es 7. The attachment comprises a tubular attaching member 8 and an aligning trough 9 hinged thereto.` The attaching member 8 is rectangular in cross section and has in one of its sides a longitudinal slot 10 that extends completely therethrough.' and which slot is considerably narrower than the internal width of said member to leave retaining flanges 11.

This attaching member 8 is adapted detachable sliding interlocking engagement with either of the T-flanges 7 of the leg of the square 6. as best shown in Fig. 2. The aligning trough 9 is secured to the attaching member 8 by a long hinge 12. When the attachment is applied to the square 6. as shown in Fig. 1. the aligning trough 9 holds a. round'rod 13 for parallel swinging movement in the arc of a circle in respect to the sides of the blade of the square 6 and perpendicular thereto. The rod 13 may be held by the aligning trough 9 against either'side of the blade of the square 6 or it may be held with one of its ends against` one of the forv longitudinal edges of the blade of said square,as indicated in Fig. 2, to determine whether or not saidend is cutat right angles to the axis of the rod. It is of course understood that the attachment may be used fory holding various different articles.

In Fig. 4 there is indicated a round member 14 having a large head 15, and which' member is held by the aligning trough 9' t0 position its head 15 on the outer longitudinal edge of the blade of the square 6 to deter` mine whether or not the same extends at right angles in respect to the axis of the member 14.

Referring now to the modification shown in Fig. 5, thenumeral 16 indicates an attaching member that is U-shaped in cross section. and adapted to be secured to one of' the members of a carpentelJs square 17, indicated by broken lines. The sides of the attaching members 16` at their fre-e longitudinal edges, are leaf sprung together so as to engage the square 17 with a yielding clamping action to hold the same where positioned. An aligning trough 18 is secured to the attaching member 16 by a long hinge 19. l Y

From the above description it is evident that the attachment may be very quickly `applied to or removed from a. square and will positively center and hold the object placed therein so that it may be tested Awith the squareto gauge its several surfaces.

What I claim is:

1. A square attachment comprising an elongated body member applicable to onev member of a square so as to be held in parallel arrangement therewith. and an aligning trough hinged Vto said body' member so as to swing about an axis parallel to the member of the square to which the body member is attached.

2. A square attachment 'comprising an elongated body member applicable to one y'member of aA square so as to be held in parallel arrangement therewith. and an aligning i trough hinged to saidA body member so as to swing about an axis parallel to the member of the square to which the'body member is` attached and to swing under the other member of the square or on either side thereof.

3. A square attachment comprising au elongated body member arranged for sliding interlocking engagement with one of the members `of a square so as to beheld in parallel arrangement therewith, and an aligning trough Yhinged to said body so as to Swing about an axis parallel to the Vmember of the square to which the body member is` attached and to swing under the other member` of the square or on either side thereof.

4. yThe combination with a Square,V of an aligning trough carried by the square andr hinged in respect to the inner longitudinal edge of one member nf the square for swinging movement about an axis toand under the inner longitudinal edge of the other member of the square, whereby an parallel there- 10 noted member of the square or the inner 15 longitudinal edge thereof. y

In testimonywhereoi1 I aHiX my signature.

JACOB L. GRASS. 

